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What’s more terrifying than an alien invasion? To answer that, you have to look inward as the highly anticipated fourth season of Supergirl will make clear. With the cast gathered for San Diego Comic-Con, DC spoke with Melissa Benoist, Mehcad Brooks, David Harewood, Chyler Leigh, Katie McGrath, Jesse Rath and executive producers Jessica Queller and Robert Rover about what lies ahead for the Girl of Steel, including a much larger role for Brainiac-5, TV’s first trans superhero, the menacing Agent Liberty and Supergirl‘s take on the classic Elseworlds story, Superman: Red Son.